Mammary gland tumours represent twenty five per cent of all neoplasms in bitches. The incidence is more in old age affecting last two posterior pairs of mammary gland as they are more prone for trauma (Sastry, 1983). Further the incidence is more in unbred bitches than those which are regular breeders (Tiwari et al., 1998). The incidence of duct carcinoma involving central pair of mammary gland is relatively rare. Therefore, the authors place on record a case of fibrosarcoma in a Pomeranian bitch which was successfully treated surgically.
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机译：乳腺肿瘤占母犬所有肿瘤的百分之二十五。老年人的发病率更高，因为它们更容易受到创伤的影响，最后两对后乳腺对很容易受到伤害（Sastry，1983）。此外，与常规繁殖者相比，未繁殖的母犬的发生率更高（Tiwari et al。，1998）。涉及中央乳腺对的导管癌的发生率相对较少。因此，作者将博美犬母犬中纤维肉瘤的病例记录在案，该病例已通过手术成功治疗。
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